Arpad

(Isa 10:9; 36:19; 37:13), also Arphad, support, a Syrian city near Hamath, along with which it is invariably mentioned (2Kings 19:13; 18:34; Isa 10:9), and Damascus (Jer 49:23). After a siege of three years it fell (B.C. 742) before the Assyrian king Tiglath-pileser II. Now Tell Erfud.

EBD - Easton's Bible Dictionary